John 7:22

Because of this Moses has given you circumcision (not that it is from Moses, but from the fathers), and you circumcise a man on the Sabbath.

Leviticus 12:3

And on the eighth day his foreskin's flesh shall be circumcised.

Genesis 17:10-14

This [is] my covenant which you shall keep, between me and you, and [also] with your offspring after you: Every male among you shall be circumcised.

Romans 4:9-11

Therefore, [is] this blessing for {those who are circumcised}, or also for {those who are uncircumcised}? For we say, "Faith was credited to Abraham for righteousness."

Galatians 3:17

Now I am saying this: the law, that came after four hundred and thirty years, does not revoke a covenant previously ratified by God, in order to nullify the promise.

Treasury of Scripture Knowledge

Summary

Moses therefore gave unto you circumcision; (not because it is of Moses, but of the fathers;) and ye on the sabbath day circumcise a man.

Bible References

Circumcision

Genesis 17:10
This [is] my covenant which you shall keep, between me and you, and [also] with your offspring after you: Every male among you shall be circumcised.
Leviticus 12:3
And on the eighth day his foreskin's flesh shall be circumcised.
Romans 4:9
Therefore, [is] this blessing for {those who are circumcised}, or also for {those who are uncircumcised}? For we say, "Faith was credited to Abraham for righteousness."
Galatians 3:17
Now I am saying this: the law, that came after four hundred and thirty years, does not revoke a covenant previously ratified by God, in order to nullify the promise.

General references

Genesis 21:4
And Abraham circumcised Isaac his son [when he was] eight days old, as God had commanded him.
Leviticus 12:3
And on the eighth day his foreskin's flesh shall be circumcised.
John 9:14
(Now the day on which Jesus made the clay and opened his eyes was the Sabbath.)